* Question
| What is an atomic switch? |
* Answer
| The so-called atomic switch is a very small gap (nano-scale) in the device, through the corresponding electrical operation.A “conducting passage” capable of changing the resistance state is connected or disconnected in the middle of this extremely small slit, thereby realizing a change in the resistance state.As shown in the figure, a very thin layer of silver is sandwiched between the lower electrode silver sulfide and the upper electrode platinum. At this time, the upper and lower electrodes are in a low resistance state due to the communication of the metallic silver.
And moving in the direction of silver sulfide driven by the electric field, because the lower electrode is silver sulfide, the oxidized silver ions can enter the lower electrode structure, so that a thin layer of air appears in the original thin layer of silver, then the upper and lower electrodesThe connection is no longer connected and the device is in a high resistance state.Such devices typically use the metal redox reaction and electromigration described above to form a conductive bridge to complete high and low resistance transitions, and require very small dimensions (nanoscale) of the conductive bridge. The key to making such a device is how to form a very small size.Electrode gap. |
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